Mengyan Zeng
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View article: Stability improvement of <sup>40</sup>Ca<sup>+</sup> optical clock by using a transportable ultra-stable cavity
Stability improvement of <sup>40</sup>Ca<sup>+</sup> optical clock by using a transportable ultra-stable cavity Open
The instability of the clock laser is one of the primary factors limiting the instability of the optical clocks. We present an ultra-stable clock laser based on a 30-cm-long transportable cavity with an instability of ∼3 × 10 −16 at 1 s–10…
View article: Towards a transportable Ca$^+$ optical clock with a systematic uncertainty of $4.8\times 10^{-18}$
Towards a transportable Ca$^+$ optical clock with a systematic uncertainty of $4.8\times 10^{-18}$ Open
We present a compact, long-term nearly continuous operation of a room-temperature Ca$^+$ optical clock setup towards a transportable clock, achieving an overall systematic uncertainty of $4.8\times 10^{-18}$ and an uptime rate of 97.8% ove…
Absolute frequency measurements with a robust, transportable ^{40}Ca^{+} optical clock Open
We constructed a transportable 40Ca+ optical clock (with an estimated minimum systematic shift uncertainty of 1.3*10^(-17) and a stability of 5*10^(-15)/sqrt{tau} ) that can operate outside the laboratory. We transported it from the Innova…
OsDOF11 Promotes Crown Root Formation via Cytokinin in Oryza Sativa Open
Background: Crown root is the main part of root system, which performs an important role in rice growth and development, especially in nutrition and water assimilation. Previously, we reported negative feedback regulation loop between Oryz…
A liquid nitrogen-cooled Ca+ optical clock with systematic uncertainty of 3×10-18 Open
Here we present a liquid nitrogen-cooled Ca + optical clock with an overall systematic uncertainty of 3×10 -18 . In contrast with the room-temperature Ca+ optical clock that we have reported previously, the temperature of the blackbody rad…
A liquid nitrogen-cooled Ca^+ optical clock with systematic uncertainty of 3*10^-18 Open
Here we present a liquid nitrogen-cooled Ca^+ optical clock with an overall systematic uncertainty of 3*10^-18. In contrast with the room-temperature Ca^+ optical clock that we have reported previously, the temperature of the blackbody rad…
Nearly continuous Ca^+ optical clocks with stability at the 10^-18 level Open
Optical clocks are important for precise measurements in the field of physics. As reported, both the instability and uncertainty of optical lattice clocks are more than two orders of magnitude smaller than those of the best microwave clock…
A Supramolecular Catalyst Self-Assembled From Polyoxometalates and Cationic Pillar[5]arenes for the Room Temperature Oxidation of Aldehydes Open
Oxidizing aldehydes to generate carboxylic acids is a crucial reaction in nature and in chemical industry. The aldehyde oxidation, an easily achieved process in liver cells, is inert toward autoxidation in industrial production and difficu…
Laser ablation and two-step photo-ionization for the generation of <sup>40</sup>Ca<sup>+</sup> Open
In this paper, we present a detailed method for rapidly and effectively loading a single 40Ca+ ion into a miniature linear Paul trap. Calcium atoms are generated by laser ablation, and the single ion is loaded and specific isotopes are sel…